题干
.Professor Zhang gave all the textbooks to all the pupils, except _____ who had already taken them.
A：these
B：ones
C：the ones
D：the other
答案(点此获取答案解析）
C
) 内的羟基与醛基之间即存在氢键(分子内氢键)，对羟基苯甲醛分子( 
)之间存在氢键(分子间氢键)。则两者的熔点沸点的相对大小关系( )
